Working with Ruby
Occasional blog posts about Ruby updates, tools, editor tweaks, and random snippets. You might also be interested in my newer project that docuements lesser-known features in Ruby: Idiosyncratic Ruby.

Storing an array of indices in an integer

Sometimes you have an array of indices. These might, for example, act as flags, whether some specific options are set or not. A nice way to store this list is, to store it in one single number.